14.3 Reaction Mechanisms, Catalysts, and Reaction Coordinate Diagrams | General Chemistry 

Chad provides a comprehensive lesson on Reaction Mechanisms, Catalysts, and Reaction Coordinate Diagrams. The lesson begins with an introduction to reaction mechanisms which are a the sum of a variable number of elementary reactions. These elementary reactions are identified as either unimolecular, bimolecular, or termolecular depending upon how many reactant molecules there are. It is then explained how to identify intermediates and catalysts in a reaction mechanism. Finally, it is demonstrated how to determine the rate law of a reaction from the mechanism.
A comprehensive description of a catalyst is then provided along with a reaction coordinate diagram. Delta H, transition state(s), intermediate(s), and the activation energy in both the forward and reverse reactions are identified on the reaction coordinate diagrams.
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00:00 Lesson Introduction
00:42 Reaction Mechanisms and Elementary Reactions
04:50 How to Identify Intermediates and Catalysts in Reaction Mechanisms
07:28 How to Determine the Rate Law from a Reaction Mechanism
24:54 Characteristics of Catalysts
29:24 Reaction Coordinate Diagrams
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